121973939 has 8 divisors (see below), whose sum is σ = 129642240. Its totient is φ = 114430536.

The previous prime is 121973897. The next prime is 121973959. The reversal of 121973939 is 939379121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121973939 - 2¹² = 121969843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121973939.

It is not an unprimeable number, because it can be changed into a prime (121973959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29207 + ... + 33120.

It is an arithmetic number, because the mean of its divisors is an integer number (16205280).

Almost surely, 2^121973939 is an apocalyptic number.

121973939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121973939 is a deficient number, since it is larger than the sum of its proper divisors (7668301).

121973939 is a wasteful number, since it uses less digits than its factorization.

121973939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62449.

The product of its digits is 91854, while the sum is 44.

The square root of 121973939 is about 11044.1812281400. The cubic root of 121973939 is about 495.9322485394.

The spelling of 121973939 in words is "one hundred twenty-one million, nine hundred seventy-three thousand, nine hundred thirty-nine".